mgcp: Allow to change the receive (the loopback part) via the VTY
diff --git a/openbsc/src/mgcp/mgcp_protocol.c b/openbsc/src/mgcp/mgcp_protocol.c
index d12d182..5883c15 100644
--- a/openbsc/src/mgcp/mgcp_protocol.c
+++ b/openbsc/src/mgcp/mgcp_protocol.c
@@ -409,6 +409,8 @@
 		    error_code = 517;
 		    goto error2;
 		}
+
+		endp->orig_mode = endp->conn_mode;
 		break;
 	default:
 		LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n",
@@ -513,6 +515,7 @@
 		    error_code = 517;
 		    goto error3;
 		}
+		endp->orig_mode = endp->conn_mode;
 		break;
 	case 'Z':
 		silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0;
@@ -762,4 +765,6 @@
 
 	endp->net_seq_no = endp->bts_seq_no = 0;
 	endp->net_lost_no = endp->bts_lost_no = 0;
+
+	endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE;
 }
diff --git a/openbsc/src/mgcp/mgcp_vty.c b/openbsc/src/mgcp/mgcp_vty.c
index 49974c1..323b311 100644
--- a/openbsc/src/mgcp/mgcp_vty.c
+++ b/openbsc/src/mgcp/mgcp_vty.c
@@ -254,12 +254,41 @@
 	return CMD_SUCCESS;
 }
 
+DEFUN(loop_endp,
+      loop_endp_cmd,
+      "loop-endpoint NAME (0|1)",
+      "Loop a given endpoint\n"
+      "The name in hex of the endpoint\n" "Enable/Disable the loop\n")
+{
+	struct mgcp_endpoint *endp;
+
+	int endp_no = strtoul(argv[0], NULL, 16);
+	if (endp_no < 1 || endp_no >= g_cfg->number_endpoints) {
+		vty_out(vty, "Loopback number %s/%d is invalid.%s",
+		argv[0], endp_no, VTY_NEWLINE);
+		return CMD_WARNING;
+	}
+
+
+	endp = &g_cfg->endpoints[endp_no];
+	int loop = atoi(argv[1]);
+
+	if (loop)
+		endp->conn_mode = MGCP_CONN_LOOPBACK;
+	else
+		endp->conn_mode = endp->orig_mode;
+
+	return CMD_SUCCESS;
+}
+
 int mgcp_vty_init(void)
 {
 	install_element_ve(&show_mgcp_cmd);
+	install_element(ENABLE_NODE, &loop_endp_cmd);
 
 	install_element(CONFIG_NODE, &cfg_mgcp_cmd);
 	install_node(&mgcp_node, config_write_mgcp);
+
 	install_default(MGCP_NODE);
 	install_element(MGCP_NODE, &ournode_exit_cmd);
 	install_element(MGCP_NODE, &ournode_end_cmd);